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🌍 Environmental Rules/Coastal Development

Kapolei vs Mililani Town

How do coastal development rules compare between Kapolei, HI and Mililani Town, HI?

Mililani Town has fewer restrictions than Kapolei.

Kapolei, HI

Honolulu County

Heavy Restrictions

Kapolei projects near the leeward coast may fall within a Special Management Area regulated by ROH Chapter 25, implementing Hawaii's HRS Chapter 205A coastal zone management program.

View full Kapolei rules β†’

Mililani Town, HI

Honolulu County

Few Restrictions

Mililani Town sits inland and is generally outside Honolulu's Special Management Area under ROH Chapter 25, so most projects do not need SMA permits.

View full Mililani Town rules β†’

Key Facts Comparison

FactKapoleiMililani Town
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Highlighted rows indicate differences between cities.

Kapolei FAQ

Is Kapolei itself within the SMA?

Most of the Kapolei urban core is inland of the SMA, but coastal-adjacent parcels and certain corridors may fall within the SMA boundary.

Do I need an SMA permit to rebuild a coastal-area wall?

Possibly. Any development within the SMA meeting Chapter 25's thresholds requires an SMA minor or major permit before work begins.

Mililani Town FAQ

Do I ever need an SMA permit in Mililani?

Almost never for standard Mililani Town properties; the SMA boundary does not reach the community.

What if I build on a beach property elsewhere?

Coastal parcels outside Mililani are very likely inside the SMA and would need city and often state approvals.

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